/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SKSL_IFSTATEMENT
#define SKSL_IFSTATEMENT

#include "src/sksl/SkSLPosition.h"
#include "src/sksl/ir/SkSLExpression.h"
#include "src/sksl/ir/SkSLIRNode.h"
#include "src/sksl/ir/SkSLStatement.h"

#include <memory>
#include <string>
#include <utility>

namespace SkSL {
class Context;

/* *
 * An 'if' statement.
 */
class IfStatement final : public Statement {
public:
    inline static constexpr Kind kIRNodeKind = Kind::kIf;

    IfStatement(Position pos, std::unique_ptr<Expression> test, std::unique_ptr<Statement> ifTrue,
        std::unique_ptr<Statement> ifFalse)
        : INHERITED(pos, kIRNodeKind), fTest(std::move(test)), fIfTrue(std::move(ifTrue)), fIfFalse(std::move(ifFalse))
    {}

    // Creates a potentially-simplified form of the if-statement. Typechecks and coerces the test
    // expression; reports errors via ErrorReporter.
    static std::unique_ptr<Statement> Convert(const Context &context, Position pos, std::unique_ptr<Expression> test,
        std::unique_ptr<Statement> ifTrue, std::unique_ptr<Statement> ifFalse);

    // Creates a potentially-simplified form of the if-statement; reports errors via ASSERT.
    static std::unique_ptr<Statement> Make(const Context &context, Position pos, std::unique_ptr<Expression> test,
        std::unique_ptr<Statement> ifTrue, std::unique_ptr<Statement> ifFalse);

    std::unique_ptr<Expression> &test()
    {
        return fTest;
    }

    const std::unique_ptr<Expression> &test() const
    {
        return fTest;
    }

    std::unique_ptr<Statement> &ifTrue()
    {
        return fIfTrue;
    }

    const std::unique_ptr<Statement> &ifTrue() const
    {
        return fIfTrue;
    }

    std::unique_ptr<Statement> &ifFalse()
    {
        return fIfFalse;
    }

    const std::unique_ptr<Statement> &ifFalse() const
    {
        return fIfFalse;
    }

    std::string description() const override;

private:
    std::unique_ptr<Expression> fTest;
    std::unique_ptr<Statement> fIfTrue;
    std::unique_ptr<Statement> fIfFalse;

    using INHERITED = Statement;
};
} // namespace SkSL

#endif
